Summary Topic 4 Sustainabilty and Fibres

Sustainability
Grow plant decompose
product
-
> - >



-
S.I units



Coppicingplants -toallow treesto reo
a



>
-
Renewable resources

indefinitely without
↳ used out
running

Alternatives >
- regrow , decompose
Plants - animals

↳
requires Hearing
with
knd
-
mixed plastics


Oils
(fossil fuels) & take millions of years
-




to
form
↳ finite resource


↳ are
stronger
Fi bres
Fibres
long strong apered flexible
-

, ,




L
Fiber cells

highly
are


lignified
long and
for strengh j
sustainable
>
- as
they decompose and
regrow

cellulose microfibrils form net like
e .




.
g
a
arrangement
Secondary thickening or
secondary cell wall
is twicker and
lignified.